A shameless plug! Answered
Right, I've cut it fine on the deadline, so I'm giving my Invisible Costume Instructable a shameless plug here = got to get the view-count up somehow ;-)
If you need any incentive to have a look, it's the costume I failed to make in time for the Hallowe'en contest. Go see what you nearly missed.
Why are you still reading this? go, click, get my view-count up!